1 // This file is Copyright its original authors, visible in version control
4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
7 // You may not use this file except in accordance with one or both of these
10 //! Further functional tests which test blockchain reorganizations.
12 use chain::channelmonitor::{ANTI_REORG_DELAY, ChannelMonitor};
13 use chain::transaction::OutPoint;
14 use chain::{Confirm, Watch};
15 use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs};
16 use ln::features::InitFeatures;
17 use ln::msgs::{ChannelMessageHandler, ErrorAction};
18 use routing::network_graph::NetworkUpdate;
19 use util::enforcing_trait_impls::EnforcingSigner;
20 use util::events::{Event, MessageSendEvent, MessageSendEventsProvider, ClosureReason};
22 use util::ser::{ReadableArgs, Writeable};
24 use bitcoin::blockdata::block::{Block, BlockHeader};
25 use bitcoin::blockdata::script::Builder;
26 use bitcoin::blockdata::opcodes;
27 use bitcoin::hash_types::BlockHash;
28 use bitcoin::secp256k1::Secp256k1;
33 use ln::functional_test_utils::*;
35 fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) {
36 // Our on-chain HTLC-claim learning has a few properties worth testing:
37 // * If an upstream HTLC is claimed with a preimage (both against our own commitment
38 // transaction our counterparty's), we claim it backwards immediately.
39 // * If an upstream HTLC is claimed with a timeout, we delay ANTI_REORG_DELAY before failing
40 // it backwards to ensure our counterparty can't claim with a preimage in a reorg.
42 // Here we test both properties in any combination based on the two bools passed in as
45 // If local_commitment is set, we first broadcast a local commitment containing an offered HTLC
46 // and an HTLC-Timeout tx, otherwise we broadcast a remote commitment containing a received
47 // HTLC and a local HTLC-Timeout tx spending it.
49 // We then either allow these transactions to confirm (if !claim) or we wait until one block
50 // before they otherwise would and reorg them out, confirming an HTLC-Success tx instead.
51 let chanmon_cfgs = create_chanmon_cfgs(3);
52 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
53 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
54 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
56 create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
57 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
59 // Make sure all nodes are at the same starting height
60 connect_blocks(&nodes[0], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[0].best_block_info().1);
61 connect_blocks(&nodes[1], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[1].best_block_info().1);
62 connect_blocks(&nodes[2], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[2].best_block_info().1);
64 let (our_payment_preimage, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000);
66 // Provide preimage to node 2 by claiming payment
67 nodes[2].node.claim_funds(our_payment_preimage);
68 check_added_monitors!(nodes[2], 1);
69 get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
71 let mut header = BlockHeader { version: 0x2000_0000, prev_blockhash: nodes[2].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
72 let claim_txn = if local_commitment {
73 // Broadcast node 1 commitment txn to broadcast the HTLC-Timeout
74 let node_1_commitment_txn = get_local_commitment_txn!(nodes[1], chan_2.2);
75 assert_eq!(node_1_commitment_txn.len(), 2); // 1 local commitment tx, 1 Outbound HTLC-Timeout
76 assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-self and Offered HTLC (to-remote/to-node-3 is dust)
77 check_spends!(node_1_commitment_txn[0], chan_2.3);
78 check_spends!(node_1_commitment_txn[1], node_1_commitment_txn[0]);
80 // Give node 2 node 1's transactions and get its response (claiming the HTLC instead).
81 connect_block(&nodes[2], &Block { header, txdata: node_1_commitment_txn.clone() });
82 check_added_monitors!(nodes[2], 1);
83 check_closed_broadcast!(nodes[2], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate)
84 check_closed_event!(nodes[2], 1, ClosureReason::CommitmentTxConfirmed);
85 let node_2_commitment_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap();
86 assert_eq!(node_2_commitment_txn.len(), 3); // ChannelMonitor: 1 offered HTLC-Claim, ChannelManger: 1 local commitment tx, 1 Received HTLC-Claim
87 assert_eq!(node_2_commitment_txn[1].output.len(), 2); // to-remote and Received HTLC (to-self is dust)
88 check_spends!(node_2_commitment_txn[1], chan_2.3);
89 check_spends!(node_2_commitment_txn[2], node_2_commitment_txn[1]);
90 check_spends!(node_2_commitment_txn[0], node_1_commitment_txn[0]);
92 // Make sure node 1's height is the same as the !local_commitment case
93 connect_blocks(&nodes[1], 1);
94 // Confirm node 1's commitment txn (and HTLC-Timeout) on node 1
95 header.prev_blockhash = nodes[1].best_block_hash();
96 connect_block(&nodes[1], &Block { header, txdata: node_1_commitment_txn.clone() });
98 // ...but return node 1's commitment tx in case claim is set and we're preparing to reorg
99 vec![node_1_commitment_txn[0].clone(), node_2_commitment_txn[0].clone()]
101 // Broadcast node 2 commitment txn
102 let node_2_commitment_txn = get_local_commitment_txn!(nodes[2], chan_2.2);
103 assert_eq!(node_2_commitment_txn.len(), 2); // 1 local commitment tx, 1 Received HTLC-Claim
104 assert_eq!(node_2_commitment_txn[0].output.len(), 2); // to-remote and Received HTLC (to-self is dust)
105 check_spends!(node_2_commitment_txn[0], chan_2.3);
106 check_spends!(node_2_commitment_txn[1], node_2_commitment_txn[0]);
108 // Give node 1 node 2's commitment transaction and get its response (timing the HTLC out)
109 mine_transaction(&nodes[1], &node_2_commitment_txn[0]);
110 connect_blocks(&nodes[1], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
111 let node_1_commitment_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
112 assert_eq!(node_1_commitment_txn.len(), 2); // ChannelMonitor: 1 offered HTLC-Timeout, ChannelManger: 1 local commitment tx
113 assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-local and Offered HTLC (to-remote is dust)
114 check_spends!(node_1_commitment_txn[0], chan_2.3);
115 check_spends!(node_1_commitment_txn[1], node_2_commitment_txn[0]);
117 // Confirm node 2's commitment txn (and node 1's HTLC-Timeout) on node 1
118 header.prev_blockhash = nodes[1].best_block_hash();
119 let block = Block { header, txdata: vec![node_2_commitment_txn[0].clone(), node_1_commitment_txn[1].clone()] };
120 connect_block(&nodes[1], &block);
121 // ...but return node 2's commitment tx (and claim) in case claim is set and we're preparing to reorg
122 node_2_commitment_txn
124 check_added_monitors!(nodes[1], 1);
125 check_closed_broadcast!(nodes[1], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate)
126 check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
127 // Connect ANTI_REORG_DELAY - 2 blocks, giving us a confirmation count of ANTI_REORG_DELAY - 1.
128 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
129 check_added_monitors!(nodes[1], 0);
130 assert_eq!(nodes[1].node.get_and_clear_pending_events().len(), 0);
133 disconnect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
136 header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 },
139 connect_block(&nodes[1], &block);
141 // ChannelManager only polls chain::Watch::release_pending_monitor_events when we
142 // probe it for events, so we probe non-message events here (which should just be the
143 // PaymentForwarded event).
144 expect_payment_forwarded!(nodes[1], Some(1000), true);
146 // Confirm the timeout tx and check that we fail the HTLC backwards
148 header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 },
151 connect_block(&nodes[1], &block);
152 expect_pending_htlcs_forwardable!(nodes[1]);
155 check_added_monitors!(nodes[1], 1);
156 // Which should result in an immediate claim/fail of the HTLC:
157 let htlc_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
159 assert_eq!(htlc_updates.update_fulfill_htlcs.len(), 1);
160 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fulfill_htlcs[0]);
162 assert_eq!(htlc_updates.update_fail_htlcs.len(), 1);
163 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fail_htlcs[0]);
165 commitment_signed_dance!(nodes[0], nodes[1], htlc_updates.commitment_signed, false, true);
167 expect_payment_sent!(nodes[0], our_payment_preimage);
169 expect_payment_failed_with_update!(nodes[0], our_payment_hash, false, chan_2.0.contents.short_channel_id, true);
174 fn test_onchain_htlc_claim_reorg_local_commitment() {
175 do_test_onchain_htlc_reorg(true, true);
178 fn test_onchain_htlc_timeout_delay_local_commitment() {
179 do_test_onchain_htlc_reorg(true, false);
182 fn test_onchain_htlc_claim_reorg_remote_commitment() {
183 do_test_onchain_htlc_reorg(false, true);
186 fn test_onchain_htlc_timeout_delay_remote_commitment() {
187 do_test_onchain_htlc_reorg(false, false);
190 fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_unconfirmed: bool, connect_style: ConnectStyle) {
191 // After creating a chan between nodes, we disconnect all blocks previously seen to force a
192 // channel close on nodes[0] side. We also use this to provide very basic testing of logic
193 // around freeing background events which store monitor updates during block_[dis]connected.
194 let chanmon_cfgs = create_chanmon_cfgs(2);
195 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
196 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
197 let persister: test_utils::TestPersister;
198 let new_chain_monitor: test_utils::TestChainMonitor;
199 let nodes_0_deserialized: ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
200 let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
201 *nodes[0].connect_style.borrow_mut() = connect_style;
203 let chan = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
205 let channel_state = nodes[0].node.channel_state.lock().unwrap();
206 assert_eq!(channel_state.by_id.len(), 1);
207 assert_eq!(channel_state.short_to_id.len(), 1);
208 mem::drop(channel_state);
210 if !reorg_after_reload {
211 if use_funding_unconfirmed {
212 let relevant_txids = nodes[0].node.get_relevant_txids();
213 assert_eq!(&relevant_txids[..], &[chan.3.txid()]);
214 nodes[0].node.transaction_unconfirmed(&relevant_txids[0]);
216 disconnect_all_blocks(&nodes[0]);
218 if connect_style == ConnectStyle::FullBlockViaListen && !use_funding_unconfirmed {
219 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 2 confs.");
221 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.");
223 check_added_monitors!(nodes[1], 1);
225 let channel_state = nodes[0].node.channel_state.lock().unwrap();
226 assert_eq!(channel_state.by_id.len(), 0);
227 assert_eq!(channel_state.short_to_id.len(), 0);
232 // Since we currently have a background event pending, it's good to test that we survive a
233 // serialization roundtrip. Further, this tests the somewhat awkward edge-case of dropping
234 // the Channel object from the ChannelManager, but still having a monitor event pending for
235 // it when we go to deserialize, and then use the ChannelManager.
236 let nodes_0_serialized = nodes[0].node.encode();
237 let mut chan_0_monitor_serialized = test_utils::TestVecWriter(Vec::new());
238 nodes[0].chain_monitor.chain_monitor.monitors.read().unwrap().iter().next().unwrap().1.write(&mut chan_0_monitor_serialized).unwrap();
240 persister = test_utils::TestPersister::new();
241 let keys_manager = &chanmon_cfgs[0].keys_manager;
242 new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[0].chain_source), nodes[0].tx_broadcaster.clone(), nodes[0].logger, node_cfgs[0].fee_estimator, &persister, keys_manager);
243 nodes[0].chain_monitor = &new_chain_monitor;
244 let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
245 let (_, mut chan_0_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
246 &mut chan_0_monitor_read, keys_manager).unwrap();
247 assert!(chan_0_monitor_read.is_empty());
249 let mut nodes_0_read = &nodes_0_serialized[..];
250 nodes_0_deserialized = {
251 let mut channel_monitors = HashMap::new();
252 channel_monitors.insert(chan_0_monitor.get_funding_txo().0, &mut chan_0_monitor);
253 <(BlockHash, ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster,
254 &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>::read(
255 &mut nodes_0_read, ChannelManagerReadArgs {
256 default_config: *nodes[0].node.get_current_default_configuration(),
258 fee_estimator: node_cfgs[0].fee_estimator,
259 chain_monitor: nodes[0].chain_monitor,
260 tx_broadcaster: nodes[0].tx_broadcaster.clone(),
261 logger: nodes[0].logger,
265 nodes[0].node = &nodes_0_deserialized;
266 assert!(nodes_0_read.is_empty());
267 if !reorg_after_reload {
268 // If the channel is already closed when we reload the node, we'll broadcast a closing
269 // transaction via the ChannelMonitor which is missing a corresponding channel.
270 assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
271 nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
274 nodes[0].chain_monitor.watch_channel(chan_0_monitor.get_funding_txo().0.clone(), chan_0_monitor).unwrap();
275 check_added_monitors!(nodes[0], 1);
278 if reorg_after_reload {
279 if use_funding_unconfirmed {
280 let relevant_txids = nodes[0].node.get_relevant_txids();
281 assert_eq!(&relevant_txids[..], &[chan.3.txid()]);
282 nodes[0].node.transaction_unconfirmed(&relevant_txids[0]);
284 disconnect_all_blocks(&nodes[0]);
286 if connect_style == ConnectStyle::FullBlockViaListen && !use_funding_unconfirmed {
287 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 2 confs.");
289 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.");
291 check_added_monitors!(nodes[1], 1);
293 let channel_state = nodes[0].node.channel_state.lock().unwrap();
294 assert_eq!(channel_state.by_id.len(), 0);
295 assert_eq!(channel_state.short_to_id.len(), 0);
298 // With expect_channel_force_closed set the TestChainMonitor will enforce that the next update
299 // is a ChannelForcClosed on the right channel with should_broadcast set.
300 *nodes[0].chain_monitor.expect_channel_force_closed.lock().unwrap() = Some((chan.2, true));
301 nodes[0].node.test_process_background_events(); // Required to free the pending background monitor update
302 check_added_monitors!(nodes[0], 1);
303 check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
304 if connect_style == ConnectStyle::FullBlockViaListen && !use_funding_unconfirmed {
305 check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: "Funding transaction was un-confirmed. Locked at 6 confs, now have 2 confs.".to_string() });
307 check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.".to_string() });
309 assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
310 nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
312 // Now check that we can create a new channel
313 create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
314 send_payment(&nodes[0], &[&nodes[1]], 8000000);
318 fn test_unconf_chan() {
319 do_test_unconf_chan(true, true, false, ConnectStyle::BestBlockFirstSkippingBlocks);
320 do_test_unconf_chan(false, true, false, ConnectStyle::BestBlockFirstSkippingBlocks);
321 do_test_unconf_chan(true, false, false, ConnectStyle::BestBlockFirstSkippingBlocks);
322 do_test_unconf_chan(false, false, false, ConnectStyle::BestBlockFirstSkippingBlocks);
326 fn test_unconf_chan_via_listen() {
327 do_test_unconf_chan(true, true, false, ConnectStyle::FullBlockViaListen);
328 do_test_unconf_chan(false, true, false, ConnectStyle::FullBlockViaListen);
329 do_test_unconf_chan(true, false, false, ConnectStyle::FullBlockViaListen);
330 do_test_unconf_chan(false, false, false, ConnectStyle::FullBlockViaListen);
334 fn test_unconf_chan_via_funding_unconfirmed() {
335 do_test_unconf_chan(true, true, true, ConnectStyle::BestBlockFirstSkippingBlocks);
336 do_test_unconf_chan(false, true, true, ConnectStyle::BestBlockFirstSkippingBlocks);
337 do_test_unconf_chan(true, false, true, ConnectStyle::BestBlockFirstSkippingBlocks);
338 do_test_unconf_chan(false, false, true, ConnectStyle::BestBlockFirstSkippingBlocks);
340 do_test_unconf_chan(true, true, true, ConnectStyle::FullBlockViaListen);
341 do_test_unconf_chan(false, true, true, ConnectStyle::FullBlockViaListen);
342 do_test_unconf_chan(true, false, true, ConnectStyle::FullBlockViaListen);
343 do_test_unconf_chan(false, false, true, ConnectStyle::FullBlockViaListen);
347 fn test_set_outpoints_partial_claiming() {
348 // - remote party claim tx, new bump tx
349 // - disconnect remote claiming tx, new bump
350 // - disconnect tx, see no tx anymore
351 let chanmon_cfgs = create_chanmon_cfgs(2);
352 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
353 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
354 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
356 let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 59000000, InitFeatures::known(), InitFeatures::known());
357 let payment_preimage_1 = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0;
358 let payment_preimage_2 = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0;
360 // Remote commitment txn with 4 outputs: to_local, to_remote, 2 outgoing HTLC
361 let remote_txn = get_local_commitment_txn!(nodes[1], chan.2);
362 assert_eq!(remote_txn.len(), 3);
363 assert_eq!(remote_txn[0].output.len(), 4);
364 assert_eq!(remote_txn[0].input.len(), 1);
365 assert_eq!(remote_txn[0].input[0].previous_output.txid, chan.3.txid());
366 check_spends!(remote_txn[1], remote_txn[0]);
367 check_spends!(remote_txn[2], remote_txn[0]);
369 // Connect blocks on node A to advance height towards TEST_FINAL_CLTV
370 // Provide node A with both preimage
371 nodes[0].node.claim_funds(payment_preimage_1);
372 nodes[0].node.claim_funds(payment_preimage_2);
373 check_added_monitors!(nodes[0], 2);
374 nodes[0].node.get_and_clear_pending_events();
375 nodes[0].node.get_and_clear_pending_msg_events();
377 // Connect blocks on node A commitment transaction
378 mine_transaction(&nodes[0], &remote_txn[0]);
379 check_closed_broadcast!(nodes[0], true);
380 check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
381 check_added_monitors!(nodes[0], 1);
382 // Verify node A broadcast tx claiming both HTLCs
384 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
385 // ChannelMonitor: claim tx, ChannelManager: local commitment tx + HTLC-Success*2
386 assert_eq!(node_txn.len(), 4);
387 check_spends!(node_txn[0], remote_txn[0]);
388 check_spends!(node_txn[1], chan.3);
389 check_spends!(node_txn[2], node_txn[1]);
390 check_spends!(node_txn[3], node_txn[1]);
391 assert_eq!(node_txn[0].input.len(), 2);
395 // Connect blocks on node B
396 connect_blocks(&nodes[1], 135);
397 check_closed_broadcast!(nodes[1], true);
398 check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
399 check_added_monitors!(nodes[1], 1);
400 // Verify node B broadcast 2 HTLC-timeout txn
401 let partial_claim_tx = {
402 let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
403 assert_eq!(node_txn.len(), 3);
404 check_spends!(node_txn[1], node_txn[0]);
405 check_spends!(node_txn[2], node_txn[0]);
406 assert_eq!(node_txn[1].input.len(), 1);
407 assert_eq!(node_txn[2].input.len(), 1);
411 // Broadcast partial claim on node A, should regenerate a claiming tx with HTLC dropped
412 mine_transaction(&nodes[0], &partial_claim_tx);
414 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
415 assert_eq!(node_txn.len(), 1);
416 check_spends!(node_txn[0], remote_txn[0]);
417 assert_eq!(node_txn[0].input.len(), 1); //dropped HTLC
420 nodes[0].node.get_and_clear_pending_msg_events();
422 // Disconnect last block on node A, should regenerate a claiming tx with HTLC dropped
423 disconnect_blocks(&nodes[0], 1);
425 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
426 assert_eq!(node_txn.len(), 1);
427 check_spends!(node_txn[0], remote_txn[0]);
428 assert_eq!(node_txn[0].input.len(), 2); //resurrected HTLC
432 //// Disconnect one more block and then reconnect multiple no transaction should be generated
433 disconnect_blocks(&nodes[0], 1);
434 connect_blocks(&nodes[0], 15);
436 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
437 assert_eq!(node_txn.len(), 0);
442 fn do_test_to_remote_after_local_detection(style: ConnectStyle) {
443 // In previous code, detection of to_remote outputs in a counterparty commitment transaction
444 // was dependent on whether a local commitment transaction had been seen on-chain previously.
445 // This resulted in some edge cases around not being able to generate a SpendableOutput event
448 // Here, we test this by first confirming one set of commitment transactions, then
449 // disconnecting them and reconnecting another. We then confirm them and check that the correct
450 // SpendableOutput event is generated.
451 let chanmon_cfgs = create_chanmon_cfgs(2);
452 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
453 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
454 let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
456 *nodes[0].connect_style.borrow_mut() = style;
457 *nodes[1].connect_style.borrow_mut() = style;
459 let (_, _, chan_id, funding_tx) =
460 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000, InitFeatures::known(), InitFeatures::known());
461 let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
462 assert_eq!(funding_outpoint.to_channel_id(), chan_id);
464 let remote_txn_a = get_local_commitment_txn!(nodes[0], chan_id);
465 let remote_txn_b = get_local_commitment_txn!(nodes[1], chan_id);
467 mine_transaction(&nodes[0], &remote_txn_a[0]);
468 mine_transaction(&nodes[1], &remote_txn_a[0]);
470 assert!(nodes[0].node.list_channels().is_empty());
471 check_closed_broadcast!(nodes[0], true);
472 check_added_monitors!(nodes[0], 1);
473 check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
474 assert!(nodes[1].node.list_channels().is_empty());
475 check_closed_broadcast!(nodes[1], true);
476 check_added_monitors!(nodes[1], 1);
477 check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
479 // Drop transactions broadcasted in response to the first commitment transaction (we have good
480 // test coverage of these things already elsewhere).
481 assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1);
482 assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1);
484 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
485 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
487 disconnect_blocks(&nodes[0], 1);
488 disconnect_blocks(&nodes[1], 1);
490 assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
491 assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
492 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
493 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
495 connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
496 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
498 assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
499 assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
500 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
501 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
503 mine_transaction(&nodes[0], &remote_txn_b[0]);
504 mine_transaction(&nodes[1], &remote_txn_b[0]);
506 assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
507 assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
508 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
509 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
511 connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
512 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
514 let mut node_a_spendable = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
515 assert_eq!(node_a_spendable.len(), 1);
516 if let Event::SpendableOutputs { outputs } = node_a_spendable.pop().unwrap() {
517 assert_eq!(outputs.len(), 1);
518 let spend_tx = nodes[0].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(),
519 Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap();
520 check_spends!(spend_tx, remote_txn_b[0]);
523 // nodes[1] is waiting for the to_self_delay to expire, which is many more than
524 // ANTI_REORG_DELAY. Instead, walk it back and confirm the original remote_txn_a commitment
525 // again and check that nodes[1] generates a similar spendable output.
526 // Technically a reorg of ANTI_REORG_DELAY violates our assumptions, so this is undefined by
527 // our API spec, but we currently handle this correctly and there's little reason we shouldn't
529 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
530 disconnect_blocks(&nodes[1], ANTI_REORG_DELAY);
531 mine_transaction(&nodes[1], &remote_txn_a[0]);
532 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
534 let mut node_b_spendable = nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events();
535 assert_eq!(node_b_spendable.len(), 1);
536 if let Event::SpendableOutputs { outputs } = node_b_spendable.pop().unwrap() {
537 assert_eq!(outputs.len(), 1);
538 let spend_tx = nodes[1].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(),
539 Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap();
540 check_spends!(spend_tx, remote_txn_a[0]);
545 fn test_to_remote_after_local_detection() {
546 do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirst);
547 do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirstSkippingBlocks);
548 do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirst);
549 do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirstSkippingBlocks);
550 do_test_to_remote_after_local_detection(ConnectStyle::FullBlockViaListen);